Sandia National Laboratories participates in the Smart Grid International Research Facility Network (SIRFN), a coordinated network of smart grid research and test facilities working on selected projects around the globe. SIRFN’s collaborative test and evaluation capabilities can be leveraged internationally to improve the design and implementation of smart grids. Interoperability test protocols are used to verify electrical behavior and communications functionality of distributed energy resources. SIRFN researchers, representing a collaboration between RSE (Italy’s Ricerca sul Sistema Energetico), Austrian Institute of Technology, National Institute of Advanced Industrial Science and Technology (AIST) Fukushima Renewable Energy Institute (FREA), and Sandia National Laboratories, presented a new interoperability testing protocol for energy storage systems at the most recent Clean Energy Ministerial (CEM7) in San Francisco. The related Distributed Energy Resource Interoperability Testing (DERIT) fact sheet is now available.